<template>
  <div class="list" ref="wrapper">
   <div>
     <div class="area">
      <div class="title border-topbottom">当前城市</div>
      <div class="button-list">
        <div class="button-wrapper">
          <div class="button">{{this.currentCity}}</div>
        </div>
      </div>
    </div>
    <div class="area">
      <div class="title border-topbottom">热门城市</div>
      <div class="button-list">
        <div class="button-wrapper"
        v-for="item of hotCities" :key="item.id"
        @click="handleCityClick(item.name)">
          <div class="button">{{item.name}}</div>
        </div>
      </div>
    </div>
    <div class="area" v-for="(item,key) of cities"
    :key="key" :ref="key">
      <div class="title border-topbottom">{{key}}</div>
      <div class="item-list">
        <div class="item border-bottom"
        v-for="innerItem of item"
        :key="innerItem.id"
       @click="handleCityClick(innerItem.name)">
          {{innerItem.name}}
        </div>
      </div>
    </div>
   </div>
  </div>
</template>
<script>
import Bscroll from 'better-scroll'
import { mapState , mapMutations} from 'vuex'
export default {
  name: 'CityList',
  props: {
    hotCities:Array,
     cities: Object,
     letter:String
  },
  computed: {
     ...mapState({
       currentCity:'city'
       })
  },
  methods: {
    handleCityClick (city) {
      this.changeCity(city)
      this.$router.push('/')
    },
    ...mapMutations(['changeCity'])

  },
  watch: {
    letter () {
      if(this.letter){
        const element = this.$refs[this.letter][0]
        this.scroll.scrollToElement(element)
      }
    }
  },
   mounted () {
    this.scroll = new Bscroll(this.$refs.wrapper)
  },
}
</script>
<style lang="stylus" scoped>
  @import '~@/assets/styles/veribles.styl'
  .border-topbottom
    &:before
      border-color #ccc
    &:after
      border-color #ccc
  .border-bottom
    &:before
      border-color: #ccc
  .list
    overflow: hidden
    position: absolute
    top: 1.58rem
    left: 0
    right: 0
    bottom: 0
  .title
    line-height .54rem
    background #eee
    padding-left  .2rem
    color #666
    font-size .26rem
  .button-list
    overflow hidden
    padding .1rem .6rem .1rem .1rem
    .button-wrapper
      float left
      width 33.33%
      .button
        margin .1rem
        padding .1rem 0
        text-align center
        border .02rem solid #ccc
        border-radius  .06rem
  .item-list
      .item
        line-height: .76rem
        padding-left: .2rem

</style>
